Dust collector



Aug. 28, 1923. 1,466,167

H. P. HOLDEN DUST COLLECTOR Filed May 27. 1922 2 Sheets-Sheeti 7 BY, 1% ATTORINEYJSVI NVENTOR H. P. HOLDEN DUST COLLECTOR Filed May 27. 1922 2 Sheets-Sheet 2 INVENTOR ATTQRNEYS Patented Aug. 28,. 1923.

UNITE; STA

HULBEBT PJI-IOLDEN, OFSPRINGFIELD, MASSACHUSETTS.

inns: COLLECTOR.

, Application filed May 27,1922. Serial No. 564,097.

To all whom it may concern: Be it known that I, HULBERT P. HOLDEN, citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Dust Collectors, of which the following is a specification.

This invention relates to dust collectors and more particularly to dust collectors for the confining of .dust caused by the transferring of ashes into a container.

One object of the invention is to provide a device of this character wherein the result is accomplished without the assistance of any external devices or appliances other than those wholly contained within itself.

Another object is to provide a dust collector or a dustless ash chute of neat and attractive design which is simple and inexpensive to construct and positive inoperation. Another object is to provide a dust collece tor which is characterized by the novelaction of the different elements and by the construction and arrangement of the differ- I cut parts as hereinafter described.

My device is, particularly adapted for household or domestic use in connection with the usual barrel or can for the receptionof ashes and while in the present embodiment it is shown in a preferred form, it'is understood that the scope of the invention is defined by the appended claims. Inv the drawings,-

, Fig; 1 is afront elevation of the device;

Fig. 2 is a vertical cross-section taken through the center of the dust collector along line A-A ofFigjl;; i

Fig. 3 is a sectional view taken on the line 33of Fig.2;

Fig.4 is a detail sectionof some ofthe parts shown in Fig. 2, with the closure in open position; I

Fig. 5 is a perspective View looking at the rear, of the device. v

' Referring to the drawings the dust collector comprises a hood preferablywith a substantially wedge shape outline formed by vertical sidewalls 1, 1, an upper front wall 2, alower front wall 3, and a rear wall it set in a circular flanged cover 5 adapted to be supported 'on'an ash can, the-vertical sides of which are shown in dotted lines at 6+6 in Fig. 2. The interiorof thecover 5 is cut away to provide a sufficiently large opening for the bottom of the hood alsoto allow a wide enough circular seat forresting the hood on the top edge of-ash'cans; of various sizes. The side ivallsl, 1, rear wall 4 and lower front wal1'8jare joined to the cover 5 in any suitable manner a's by crimping their edges to the corresponding interior edges of thecover andsoldering same so as to insure substantially air tight'joints and a stable support for the'walls upon the cover. The walls are oined together likewise along their respective adjacent edges. The 'seat'on the under side of the cover i lined with packing 7 to provide an air tight connection with the ash can. i

Atthe front of the hood is aninclined chute 8 provided With'a ceiling 9, floor 10,

and sides 11, 11, The ceilingQand. sides 11, 2

11 are preferably formed as an extension from the upper front wall 2, the side's'flll, 11 providing sho'uldersfl 12, 12 at their inner edges on the side walls 1,1 of thehood and the ceiling 9 terminating in a' shoulder 13 at its loweredge. The floor 10 is joined totlie upper edge of thelower front wall 3 form ing a ledge'24 and provides a-shoulder 14 at its lower edge. The several shoulders 12, 12, 13, and 14 thus describedbound the edges of the inlet opening at the lower end of said chute Sand serve to form a seat for a closure or door 15. Q 1 y The door or closure 15 pivotally hinged to the side walls, 1, "1 by pivot pins 16 passingtherethrough is arranged to close the opening at the lowerendof chute 8 formed by the shoulders 12,12,13and 14 above described. The door 15 is constructed so that its hinged joint is substantially air-tightat all times and is provided with side flanges 17 17 to I which are attached felt strips 19 contacting with the sides 1,1. The shoulders12, 12,13. and 14 are also preferably lined with felt strips 20 against which the door 15 rests when in closed position. This construction provides' a substantially air-tight closing of the'chute 8 when thejdoor 15 isin closed po-'. sition and provides an entrance at the bottom ofnthe chute substantially restricted to the passage of ashes when? the dooris opened by" a v charge ofv ashes entering" said hood; v The door 15 is provided with neans t'ofautoniati cally 'close,;.samfe which consists "preferably of balanced weights 21" attached to each side. edge of the samejasi'show'n. The door, 15 is also provided atits loweredge with a flange 18 to which is flexiblyattaclied a contact flap 22 which lies upon an extension 23 of the lower frontwall 3 and slightly overlaps same when the door is in closed position. function of said flap 22 cooperating with the extension 23 is to assist in maintaining a substantially closed condition of said inlet opening against the egress of dust during the passage of said charge of ashes into said hood.

At the rearof the hood a relatively .large rectangular opening is defined by the edges of the side walls 1,11, rear wall 4 and the upper front wall 2 which at all times is closed within the chamber 21. In order to arrange the movable wall or covering2Q so as to be readily responsive toslight var ation of air pressure within the hood, it is preferably hung between supports one above the other so as to. furnish an extensive vertically hung portion as shown. This arrangement allowsthe covering 20" to serve as a self-cleaning baffle for the dust. collecting thereon and being hung over the container permits the dust to drop therein.

'A'grid or cover 25 may be provided for the rear movable: wall of the hood to protect the covering 20 from injury and.

handles 26 are preferably attached to the sidewalls 1', 1 which allow convenient ha'n dling of the device.

A brace 27 is also preferably provided extending between the flange of the cover 5 and the lower front wall 3 to reinforce the latter. I Y

' In operation the door or closure 15 1s 2 moved inwardly by the. ashes sliding down the chute 8- and isopened to allow theashes to fall. off the extension 23 into the/container, This opening movement of the door 15 sets up an air wave Within the chamber 21 which acts upon the'covering 20; forming' the movable wall fcausing it to move outwardly and expand the, chamber 21; This outward movement ofj'wall 20 is further assisted by the displacement-of air within- 'thefchamber caused by the volume; of'a'shes entering said chamber. This pressure or displacement of theairwithin the chamber 21' is relieved by the outward movement' of the coverin by which tlns displacement of'air is allowed for, the air thus displaced will seek an egress The 1 the receptacle.

20 hangs loosely from the edges 20. Unless there is a means through they entrance through which the ashes are passing. Therfiap is-arranged so that it will fit closely around the entering ashes-thereby maintaining a substantially closed condition of the opening against the egress of dust while the ashes are entering Thus by the action of the expansible chamber and the arrangement of the door and flap any dust within the chamber will be prevented from escaping.

Before the chamber 21; starts to contract by reason of the covering 20 falling back to'its normal position or" any out draft of air is set up adjacent the door opening," the door 15" is automatically closed; by the weights 21 thereby, preventing theflescape"'o'fdust within the hood. The employment of the flexibly hinged flap 22' at the lower edge of the door 15 has the advantage both of main taining the closed condition of the chute iii-flet opening during the initial opening move ment of the door 15 and also of maintaining a closed condition of the opening against the egress of dust while the ashes are falling into the container. 'Finally when the'last portion of the ash mass has fallen ioff the extension'23' there is created a slightsuction into the container caused byair following in behind the ash mass which will Carry. with it any dust adj acentthe openingat this point'of the operation. V

i There is thus provided' a device in which the opening is substantially closed at all. times; the closure being opened only far enough to allow the ash inassito. enter and the ash mass itself with. the help of thefiap closing the opening' at this'time; and in which the displacement of'air caused by the initial" openingtinovement of the door and. the ashfmass falling into the container is allowed for so that all the dust 'is coll'ected in the hood. i i

It is obvious that while the preferred I form of the "invention asshowiris adapted for use "with containers of the ash' can or barrel type it maybe used with other 'type containers and is peculiarly adaptedv forfuse' with ash sifters.

W'hatIclaimis: V l. A dust collectorjcomprising an enclosinghood having a'ninlet opening for a charge of material, a closure forfsaid opening, said hood provided with means to form an expansible closedchamber therein adapt- 1'20.

edto allow for thedi'splacem'ent of air within said hood caused by said'charge of mate rial entering said'hood'thru said opening said. closure comprising means to maintain a'substantially closed condition of said open ing. against the egress of dust during the passage "of said chargebf material thereir 2. "A dust collector comprising an enclos- V ingjh'ood having a'flexible wall forming an expansible chamberthereinfan inletOpeh ing in said hood for a charge of material, a closure for said opening comprlsmg means to maintain a substantially closed condition of 'said opening against the egress of dust during the passage of said chargeof material entering said hood thru said inlet opening.

3. A dust collector comprising an enclosing hood having a flexible wall forming an expansible chamber therein, an inlet chute for conducting a charge of material into said hood, an inwardly opening door for said chute arranged to coact with the walls of said chute to maintain a substantially closed condition of said chute against the egress of dust during the passage of sai charge of material therethru,

4. A dust collector comprising an enclosing hood having a flexible wall forming an expansible chamber therein, an inlet chute for conducting a charge of material into said hood, an inwardly opening door for said chute arranged to coact with the walls of said chute to maintain a substantially closed condition of said chute against the egress of dust during the passage of said charge of material therethru, and means to automatically shut said door after said passage of said charge of material thru said chute.

5. A dust collector comprising an enclosing hood having a movable wall of light fabric substantially impervious to dust forming an expansible chamber within saidhood, an inlet opening in said hood for a charge of material, a closure for said opening com-v prising means to maintain a substantially closed condition of said opening against the egress of dust during the passage of said charge of material entering said hood thru said inlet opening.

6. A dust collector comprising, an enclosing hood having a movable Wall of light fabric hung in a loose sagging fold between upper and lower points of support and forming an cxpansible chamber within said hood, an inlet opening in said hood for a charge of material, a closure for said opening comprising means to maintain a substantially closed condition of said opening, against the egress of dust during the passage of said charge of material entering said hood thru said inlet opening. g

7. A dust collector comprising an enclosing hood having a flexible wall forming an expansible chamber therein, a downwardly and inwardly inclined inlet chute with an opening at its lower end for conducting a charge of material into said hood, a pivotally hung door for the lower end of said chute, said door normally being inclined from the vertical with its lower edge toward the mouth of said chute and arranged to coact with the walls of said chute to maintain a substantially closed condition of said passage of chute againststhe egress of dust during the said charge of material therei thru. v 7 v c 8. A dust collector comprising an. enclosing hood having a flexible wall forming an expansible chamber therein, a downwardly and inwardly inclined inlet'chute with an opening at its lower end for conducting a charge of material into said hood, a pivotally hung door for-the lower end of said chute, said door normally being inclined from the vertical with its lower edge toward the mouth of said chute and arranged to coact with the walls of said chute to maintain a substantially closed condition of said chute against the egress of dust during the passage of said charge of material therethru, and means to automatically shut said door after the passage of said charge of material thru said opening.

9. A dust collector comprising an enclosing hood having a flexible wall forming an expansible chamber therein, a downwardly and inwardly inclined inlet chute with an opening at its lower end for conducting a charge ofmaterial into said hood, an inwardly opening door for said chute open- 1ng, a flexible flap connected to the lower edge of said door, said door and said flap arranged to coact with the walls of. said chute to maintain a substantially closed condition of said chute opening against the egress of dust during the passage of said charge of material'therethru.

10. A dust collector comprising an enclosing hood having a downwardly and inwardly inclined inlet chute with an opening at its lower end for conducting a charge of material into said hood, an inwardly opening door for said chute opening, a flexible flap connected to the lower edge of said door, said door-and said flap arranged to co act With the walls of said chute to maintain a substantially closed conditionof said chute opening against the egress of dust during the passage of said charge of material therethru, and said hood provided with means to form an expansible chamber there-' ing hood, an inclined chute with an opening at its lower end'into said hood, said chute having a bottom'extension into said hood beyond said opening, a movable closure for said chute opening having a flexibly connected flap for contact with said bottom extension, said hood having an expansible chamber adapted to expand upon each open ing movement or said closure.

12. A dust collector comprising a circular base, and a substantially wedge-shaped hood, a downwardly, inclined chute extending through one-inclined side Wall of said hoocl ancl'having anopening-at its lower end into said hood, a movable Closure for said chute opening, a movable Wall of light fabric hung loosely at the othensicle of said hood upon supports adjacent theapex and base of said hood, said'movable Wall fonning. an exmovable closure. 10

In testimony whereof Iihz We affixed my signature. t V

HULBERT 'P. HOLDEN. 

